Integration with Microsoft Office 365 Calendar - Security

Summary:

Hello,

We would like to know how the integration works regarding security points. When the integration access the data on Microsoft it copy and retain the data on HCM or it just consult and do dot retain the data?
We are woried about the data security.

Thanks

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Version (include the version you are using, if applicable):

25A

Code Snippet (add any code snippets that support your topic, if applicable):